JSP compilation error when moving from WebLogic

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Issue

We are migrating from WebLogic. JSPs worked fine there, but we see the following compilation failure after moving to JBoss:

JBWEB004060: An error occurred at line: 38 in the jsp file: /pageName.jsp
ArrayList cannot be resolved to a type

java.io and java.util classes are not resolved after moving to JBoss from WebLogic.

Environment

JBoss Enterprise Application Platform (EAP)
Tomcat

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